Sand mixing and performance testing I. Experimental content 1. Sand mixing process (1) Determine the sand formula: the ratio of new sand, clay and water. (2) Select new sand and clay: determine the origin of new sand, the origin and type of clay. (3) Determine the mixing process: whether to dry mix first or wet mix first, and the mixing time. 2. Prepare standard sand samples 3. Sand compaction rate test 4. Sand air permeability test 5. Sand wet compressive strength test. 6. Sand hot wet tensile strength test The above test results are filled in Table 9.1. Table 9.1 Performance of different sands
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